[jdk18u] RFR: 8279223: Define version in .jcheck/conf

[Erik Joelsson]

This patch adds the version field to .jcheck/conf. By doing this we can remove the corresponding configuration from the Skara bots, which in turn reduces the need for timing and general complexity of starting a new JDK release.

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Commit messages:
 - JDK-8279223

Changes: https://git.openjdk.java.net/jdk18u/pull/5/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=5&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279223
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/5.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/5/head:pull/5

PR: https://git.openjdk.java.net/jdk18u/pull/5